[NET]: sparse warning fixes

Fix a bunch of sparse warnings. Mostly about 0 used as
NULL pointer, and shadowed variable declarations.
One notable case was that hash size should have been unsigned.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 5 insertions, 5 deletions

diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index d407992c1481..5810852c558a 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -414,7 +414,7 @@ static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
                                 break;
                 read_unlock_bh(&idev->lock);
                 in6_dev_put(idev);
-                return aca != 0;
+                return aca != NULL;
         }
         return 0;
 }
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index eb330a44bacd..532425db11fe 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -663,7 +663,7 @@ done:
                         break;
                 }
                 gsf = kmalloc(optlen,GFP_KERNEL);
-                if (gsf == 0) {
+                if (!gsf) {
                         retv = -ENOBUFS;
                         break;
                 }
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 8668ab3af32e..cc8d4e2a9531 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1407,7 +1407,7 @@ static struct sk_buff *mld_newpack(struct net_device *dev, int size)
         /* we assume size > sizeof(ra) here */
         skb = sock_alloc_send_skb(sk, size + LL_RESERVED_SPACE(dev), 1, &err);
 
-        if (skb == 0)
+        if (!skb)
                 return NULL;
 
         skb_reserve(skb, LL_RESERVED_SPACE(dev));
@@ -2144,7 +2144,7 @@ static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
         /* callers have the socket lock and a write lock on ipv6_sk_mc_lock,
          * so no other readers or writers of iml or its sflist
          */
-        if (iml->sflist == 0) {
+        if (!iml->sflist) {
                 /* any-source empty exclude case */
                 return ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
         }
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index b761dbed8cec..d4acd283111b 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -256,7 +256,7 @@ static struct ndisc_options *ndisc_parse_options(u8 *opt, int opt_len,
                         break;
                 case ND_OPT_PREFIX_INFO:
                         ndopts->nd_opts_pi_end = nd_opt;
-                        if (ndopts->nd_opt_array[nd_opt->nd_opt_type] == 0)
+                        if (!ndopts->nd_opt_array[nd_opt->nd_opt_type])
                                 ndopts->nd_opt_array[nd_opt->nd_opt_type] = nd_opt;
                         break;
 #ifdef CONFIG_IPV6_ROUTE_INFO